package com.example.filter;
import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import java.io.IOException;

//@WebFilter(urlPatterns = "/*")
public class DemoFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("初始化执行.....");
        Filter.super.init(filterConfig);
    }

    @Override
    public void destroy() {
        System.out.println("销毁....");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("demo 拦截请求");
        //放行
        filterChain.doFilter(servletRequest,servletResponse);
        System.out.println("demo 放行");
    }
}
